Does the UK "remove" local communist leaders in the current day? How do they do it, and are there any contemporary examples of this?

Got curious, as back in the day I imagine it wouldn't be too out of place for the government to carry out the imprisonment or assaniation of a communist figure, but I haven't heard of any such things happening in the modern day (e.g. past the year 2000).

If there is a strong Marxist organisation/organizer in the UK now, what happens? Do they get deported? Imprisoned? Assaniated? Do we have any recent figures to learn about as examples?

Thank you!